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题目内容
In many branches of science, our knowledge and technology have advanced so rapidly that new studies carried out with improved instruments and techniques may well ____________ research done just twenty years earlier.
- Aconfirm
- Bsupplant
- Celaborate
- Dsupersede
- Equestion
- Fvalidate
B,D显示答案
以上解析由 考满分老师提供。